diff --git a/Gemfile.lock b/Gemfile.lock
index d853fad..6ec0f9c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,7 +4,7 @@ PATH
     diaspora_federation (0.0.8)
       faraday (~> 0.9.0)
       faraday_middleware (~> 0.10.0)
-      nokogiri (~> 1.6, >= 1.6.6)
+      nokogiri (~> 1.6, >= 1.6.6.4)
       typhoeus (~> 0.7)
       valid (~> 1.0)
     diaspora_federation-rails (0.0.8)
@@ -137,7 +137,7 @@ GEM
     multi_xml (0.5.5)
     multipart-post (2.0.0)
     nenv (0.2.0)
-    nokogiri (1.6.6.2)
+    nokogiri (1.6.6.4)
       mini_portile (~> 0.6.0)
     notiffany (0.0.8)
       nenv (~> 0.1)
diff --git a/diaspora_federation.gemspec b/diaspora_federation.gemspec
index fb2e26d..17ad400 100644
--- a/diaspora_federation.gemspec
+++ b/diaspora_federation.gemspec
@@ -21,7 +21,7 @@ Gem::Specification.new do |s|
 
   s.required_ruby_version = "~> 2.0"
 
-  s.add_dependency "nokogiri", "~> 1.6", ">= 1.6.6"
+  s.add_dependency "nokogiri", "~> 1.6", ">= 1.6.6.4"
   s.add_dependency "faraday", "~> 0.9.0"
   s.add_dependency "faraday_middleware", "~> 0.10.0"
   s.add_dependency "typhoeus", "~> 0.7"